Heater



FIG. 1 is a front, top, left-side perspective view of a heater showing my new design in a closed configuration with a cartridge to be heated mounted in the heater.

FIG. 2 is a rear, top, right-side perspective view thereof.

FIG. 3 is a front, bottom, left-side perspective view thereof.

FIG. 4 is a rear, bottom, right-side perspective view thereof.

FIG. 5 is a left-side view thereof.

FIG. 6 is a front view thereof.

FIG. 7 is a top plan view thereof.

FIG. 8 is a rear view thereof.

FIG. 9 is a right-side view thereof.

FIG. 10 is a bottom plan view thereof.

FIG. 11 is a front, top, left-side perspective view of a heater showing my new design in an open configuration.

FIG. 12 is a rear, top, right-side perspective view thereof.

FIG. 13 is a front, bottom, left-side perspective view thereof.

FIG. 14 is a rear, bottom, right-side perspective view thereof.

FIG. 15 is a front, top, right-side perspective view thereof.

FIG. 16 is a left-side view thereof.

FIG. 17 is a front view thereof.

FIG. 18 is a top plan view thereof.

FIG. 19 is a rear view thereof.

FIG. 20 is a right-side view thereof; and,

FIG. 21 is a bottom plan view thereof.

The broken lines depicting a cartridge in FIGS. 1-10 represent environmental subject matter, and the remaining broken lines depict portions of the heater that form no part of the claimed design; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a heater, as shown and described. 